Protein After 60: Why the RDA Is Not Enough

The Recommended Dietary Allowance (RDA) for protein — 0.8 grams per kilogram of body weight per day — was established by the Institute of Medicine as the amount needed to prevent clinical deficiency in healthy, sedentary adults. It was never intended to be an optimal intake for long-term health, and for adults over 60, it is increasingly recognized as inadequate.

What Is Sarcopenia?

Sarcopenia is the progressive, age-related loss of skeletal muscle mass and strength. It begins as early as the fourth decade of life and accelerates sharply after 60, with typical losses of 1–2% of muscle mass per year in sedentary older adults.

The consequences are significant: increased fall risk, reduced mobility, loss of independence, slower recovery from illness, and higher all-cause mortality. Sarcopenia is not inevitable, but preventing it requires both resistance exercise and adequate protein intake.

Why Older Adults Need More Protein

The mechanism is well-established. Older adults experience anabolic resistance — a blunted muscle protein synthesis (MPS) response to both dietary protein and exercise compared to younger adults. To achieve the same MPS stimulus, they need to consume more protein per meal and across the day.

Additionally, older adults often have lower overall caloric intake, reduced digestive efficiency, and competing protein needs from immune function and tissue repair.

What the Research Says

The European Society for Clinical Nutrition and Metabolism (ESPEN) published guidelines in 2016 recommending:

  • 1.0–1.2 g/kg/day for healthy older adults
  • 1.2–1.5 g/kg/day for those with acute or chronic illness or injury
  • Up to 2.0 g/kg/day during rehabilitation or for those with severe sarcopenia

A 2018 systematic review by Deer & Volpi analyzed 17 randomized controlled trials and found that protein supplementation consistently improved lean mass and muscle function in older adults, particularly when combined with resistance exercise.

The PROT-AGE Study Group, a consensus panel of international experts, similarly concluded that the 0.8 g/kg RDA is insufficient for older adults and recommended 1.0–1.5 g/kg/day as the target range.

Practical Implications

For a 70 kg person over 60, the difference between 0.8 g/kg (56g/day) and 1.4 g/kg (98g/day) is roughly 42 additional grams of protein per day — the equivalent of approximately:

  • 6 oz of chicken breast, or
  • 5 large eggs, or
  • 1.5 cups of Greek yogurt plus a protein shake

This is achievable through whole foods and does not require supplementation, though protein supplements can be a practical tool for those with reduced appetite or difficulty meeting targets through diet alone.

The Bottom Line

If you are over 60, meeting the standard protein RDA will likely leave you short of what your muscles need to resist age-related atrophy. The research consistently supports a target of 1.2–1.5 g/kg/day for healthy older adults, and higher if you are actively training.

FitMetrics automatically adjusts the protein baseline for users over 60, reflecting the sarcopenia prevention target of 1.4 g/kg/day.

Enter your information in the FitMetrics calculator to see your personalized protein targets.